199442487 has 16 divisors (see below), whose sum is σ = 296386560. Its totient is φ = 118553472.

The previous prime is 199442473. The next prime is 199442513. The reversal of 199442487 is 784244991.

199442487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199442487 - 2⁷ = 199442359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199442417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101943 + ... + 103880.

It is an arithmetic number, because the mean of its divisors is an integer number (18524160).

Almost surely, 2^199442487 is an apocalyptic number.

199442487 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

199442487 is a deficient number, since it is larger than the sum of its proper divisors (96944073).

199442487 is a wasteful number, since it uses less digits than its factorization.

199442487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205862.

The product of its digits is 580608, while the sum is 48.

The square root of 199442487 is about 14122.4108069409. The cubic root of 199442487 is about 584.2596493113.

The spelling of 199442487 in words is "one hundred ninety-nine million, four hundred forty-two thousand, four hundred eighty-seven".